Tokyo Sintered Metal Company Limited

Masaoki Saitoh

A fluid apparatus of an internal gear type comprising an internal gear 3 rotatively mounted in a housing 1, an external gear 5 meshing with said internal gear 3, and a crescent partition piece disposed between the both gears, each tooth profile of said both gears 3 and 5 being defined by a line equidistant from an inner cycloid described by a rolling circle, the diameter of which is equal to a radius of the intermeshing pitch circle of the internal gear, whereby the load applied to the tooth surfaces between the meshing internal gear and external gear and thus the tooth-contact stress can be reduced, and wear of tooth surfaces and generating noise can also be minimized.

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Hiki-gun, Japan

Masaoki Saitoh